Because of security concerns, most manufacturers in different countries have abandoned the acetylenemethod, but use the butadiene method.
出于安全考虑,许多国家已放弃了乙炔法,而采用丁二烯法生产氯丁橡胶。
2
The content of acetylene and other hydrocarbon in liquid oxygen measured by gas chromatogram has gas chromatogram concentrate method and direct method.
利用气相色谱浓缩法和气相色谱直接法测定液氧中乙炔及其他碳氢化合物含量。
3
We suggest that the acetylene reduction method in vivo is simple and fast from screening best symbiotic system of soybeans and nodule bacteria in short time.